bug#49797: 28.0.50; Setting face to custom fontset doesn't work

[Eli Zaretskii]

> From: Yuan Fu <casouri@gmail.com>
> Date: Tue, 5 Oct 2021 10:31:59 -0700
> Cc: Kenichi Handa <handa@gnu.org>,
>  49797@debbugs.gnu.org
> 
> > First, Handa-san asked to try a slightly different setting; I'm not
> > sure I understand whether you did and if so, what were the results.  I
> > also don't understand if the analysis of the code above is for the
> > original test case or the one suggested by Handa-san.  I'd like to see
> > the latter.
> 
> I have indeed tried and it didn’t work, maybe you missed that message. 
> Handa-san suggests me to try setting :font attribute rather than :fontset. 
> The test code uses what he suggests: using :font attribute.

And the description what happens with the code is for that second
example, or is it for the first?  And the same question about your
proposed fix -- which case does it fix?